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Javier Gonzalez Morin et David Martimort
n° 26-1739, avril 2026
We consider the following screening model of procurement. An agent (the seller) has private information on his cost parameter. A principal (the buyer) learns an ex post signal on this parameter. The signal is private information to the principal and proper incentives to reveal this signal must be...
Özlem Bedre Defolie, Gary Biglaiser et Bruno Jullien
n° 26-1738, avril 2026
We study a startup’s choice of its “direction of innovation,” how well the technology fits alternative acquirers, and the effects on acquisition outcomes and market dominance. Two horizontally differentiated firms bid to acquire the innovation and then compete in the product market. Firms differ in...
Guillaume Cheikbossian et Jorge Peña
n° 26-1737, avril 2026
We study the evolution of other-regarding preferences in a public goods game where the production function exhibits varying degrees of complementarity between individual efforts. Individuals are rational agents who play a Nash equilibrium, but differ in the weight they assign to others’ payoffs,...
David Bardey
n° 26-1736, avril 2026
This paper studies competition between television channels in a two-sided market with asymmetric firms. Motivated by a competition case in Colombia, we consider an oligopoly with three channels—two large and one small—that compete for viewers and advertisers. Advertising affects viewers both...
Pascal Bégout et Jesus Ildefonso Diaz
vol. 46, n° 2, avril 2026, p. 185–199
We study the complex Ginzburg–Landau equation posed on possibly unbounded domains, including some singular and saturated nonlinear damping terms. This model interpolates between the nonlinear Schrödinger equation and dissipative parabolic dynamics through a complex time-derivative prefactor,...
Pascal Bégout, Jérôme Bolte, Thomas Mariotti et Francisco José Silva - Àlvarez
n° 26-1735, avril 2026
Gradient extremals are loci along which the gradient is an eigenvector of the Hessian. These objects provide a natural geometric framework connecting several notions, notably valleys and talwegs, which we analyze from a variational viewpoint in the generic case. We then show that trajectories of...
Atef Lechiheb
n° 26-1734, avril 2026
We study the stochastic Burgers equation driven by a Hermite sheet of order q ≥ 1 with additive noise, establishing the well-posedness of mild solutions via a fixed-point argument in suitable Banach spaces. Under appropriate conditions on the Hurst parameters H = (H0, H1, . . . , Hd) ∈ (1/2, 1)d+1...
Alexandre de Cornière, Kinshuk Jerath et Greg Taylor
n° 26-1733, avril 2026
This paper analyzes seller-side tying on digital platforms, where access to a core intermediation service is conditioned on sellers using an ancillary service (e.g., fulfillment or payments). We model a monopoly platform matching consumers and competing sellers across many product categories, with...
Yue Fei, Ulrich Hege et Xiao Jia
n° 26-1732, avril 2026
We study how IPO reforms transmit to venture capital (VC) markets using the introduction of China’s entrepreneurial boards, ChiNext and the registration-based STAR. We document that both boards attract younger, higher-growth firms with weaker fundamentals in levels, but postIPO growth persists for...
Victor Gay, Olivia Miske, Brian A. Nosek et Timothy M. Errington
n° 652, avril 2026
Published claims should be reproducible, yielding the same result when the same analysis is applied to the same data1,2. Here we assess reproducibility in a stratified random sample of 600 papers published from 2009 to 2018 in 62 journals spanning the social and behavioural sciences. The authors of...
